Elastic-fluid turbine.



- PATENTED-AUG. 30, 1904.

O. JUNGGREN. ELASTIG FLUID TURBINE.

APPLICATION FILED APR. 29, 1903.

2 SHEETS-BEBE! 1.

N0 MODEL.

v P fig eO vn J x Witnesses:

PATENTED AUG. '30, 1904. I

0.JUNGGREN.

ELASTIC FLUID TURBINE.

2 BHEETS-SHEET 2.

-APPLIOATION FILED APR. 29, 1903. j

Fig.4.

N0 MODEL.

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Patented August 30, 1904.

UNIT D. STATES PATENT OFFICE.

OSCAR J UNGGREN, OF SOHENEOTADY, NEW YORK, ASSIGNOR TO GEN- ERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

ELASTIC-FLUID TURBINE.

I SPECIFICATIONforming part of Letters Patent No. 768,604, dated August 30, 1904.

Application filed April 29, 1903. Serial No. 154,887. (No model.)

To aZZ whmn it 770601/ concern/.-

Be it known thatLOsoAR J UNGGREN, a citizen of the United States, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Elastic-Fluid Turbines, of which the following is a specification.

Elastic-fluid turbines of the jet type are provided with rows of wheel-buckets, between which are one or more rows 'of intermediate buckets which receive themotive fluid from one row of wheel-buckets, change its direction, and discharge it against a second row of wheel-buckets at the proper angle. My invention relates to the intermediate buckets and their supports, and has for its object to improve and simplify their conseparated from the turbine, and Fig. 5 is a detail view of an intermediate support of a slightly-modified construction.

Referring to Fig. 1, '1' represents the casing or shell, which may be divided into parts in any suitable manner. Mounted within the casing on the shaft 2 is a wheel (shown in the opening in the casing) having buckets of any suitable character. 8 represents a sectionalized nozzle for-delivering motive fluid to the wheel, and L the bowls which open directly vided which are mounted on a support 5,-thatextends through-an opening in the casing and is adjustably supported with respect thereto. Referring more particularly to Figs. 2 to 4, 1 represents the casing having an opening 6 formed in the lower half to receive the intermediate buckets and their support. In so far as the present invention is concerned,

however, the intermediates can be mounted wherever it is the most desirable. At some suitable point on the casing is formed a projection 7 with which the adjusting-screws for the upper end of the intermediates engage. The intermediate buckets 8 are formed integral with their base 9 and may be cast or cut by suitable means out of solid stock. The left-hand side of the base is curved on an arc struck from the wheel-axis. and the outer or right-hand ends of the buckets are similarly formed. The bucket-support 10 is pro vided with an inner face that is turned true and is concentric with the outer ends of the buckets which engage therewith. The outer end of thesupport has a flange 11, that acts as an attaching means and also as a cover for the opening 6. At points adjacent to the bucketsupporting surfaces are openings 12, and located therein are nuts for the clamp- 4 ing-bolts 13. Which pass through the buckets and their base into. the support.

The size of the openings can be varied to suit the conditions; but it will be found desirable to make them large enough to receive the hand, so that the nuts can be readily mounted in place. The heads of the bolts are countersunk. so that the inner curved surface of the bucketbase will present an'unbroken surface to the wheel. The flange ll of the support is provided with lugs 14 at its upper end, thatare located. on opposite sides of the projection 7, and each is provided with an adjusting-screw 15. At the'lower end and on opposite sides are lugs 16, each of which carries an adjusting-screw 17, that engages the side of the easing 1. In order to clamp the intermediates in place, a number of bolts 18 are employed which have a certain amount of clearness around. their bodies, so that when they are backed off slightly the buckets can be-adjusted in a plane parallel withthe wheel-axis.- -Forme'd on the casing-below the end of the flange 11 is a guide 19 for directing the axial movements of the buckets during'adjustment.

Thus far mention has been made of a single l ing a phirality of projections formed thereon row of buckets only; but where there are more than two rows of wheel-buckets it becomes necessary to provide an additional row or rows of intermediates. Referring to Fig. 4, it will readily be seen how two or more rows of buckets can be supported. The support 10 is provided with as many curved projections 20 as there are rows of buckets, and the space 21 between the rows is when the parts are assembled occupied by the wheel-buckets. The present structure being intended for three wheels per stage, there would be in addition a row of Wheel-buckets outside of the intermediates. The projections are curved concentrically with respect to the wheel-axis and are beveled slightly from the receiving to the discharge side of the buckets. In the present illustration the lower projection has the smaller bore and is the one nearer the sectionalized nozzle. The object of this bevel is to enlarge the spaces or passages between buck ets to compensate for the increased volume of motive fluid due to decreased pressure.

In Fig. 5 is shown a slightly-diiferent form of intermediate, where one large opening-'12 is provided with overhanging ends for the support. The retaining-bolts 13 pass through the bucket structures into the support as before. The flange 5 is arranged to be attached to the casing, and two or more segmental rows of intermediates may be used.

In accordance with the provisions of the patent statutes I have described the principle of operation of my invention, together with the apparatus which 1 now consider to represent the best embodiment thereof; but I desire to have it understood that the apparatus shown is only illustrative and that the inven tion can be carried out in other ways.

hat I claim as new, and desire to secure by Letters Patent of the United States, is

1. In an elastic-fluid turbine, the combina tion of a Wheel-casing, a shaft, a bucket-support attached to the casing and provided with one or more openings, intermediate buckets formed integral with their base at one end and engaging with said support at the other, and retaining devices which pass through the bucket structure and enter the opening or openings in the support.

2. In a turbine, the comblnation of a wheelcasing, an intermediate bucket-support havand one or more openings in each for receiving retaining devices, a row of buckets for each projection, each row formed integral with its base and extending outwardly therefrom, and retaining devices which pass through the base of the buckets into the opening or openings formed in the supports.

3. In a turbine, the combination of a \\"heel casing, an intermediate bucket-support having a plurality of projections formed thereon. and one or more openings for receiving retaining devices, a means for attaching the support to the casing, a row of buckets for each projection, each row being formed integral with its base and extending outwardly therefrom, and retaining devices which pass through the base of the buckets into the opening or openings formed in the supports.

, t. In a turbine, the combination of a wheelcasing having an opening formed therein, an intermediate bucket-support having a flange which closes the opening in the casing, a plurality of curved projections on the support, intermediate buckets formed integral with their base and engaging at their outcr ends with the curved surfaces of the projections. and bolts for attaching the buckets to their support.

5. In an elastic-fluid turbine, the combination of a casing, a curved laicket-support having one or more openings formed therein, buckets formed integral with their base and engaging at their unconnected ends with the curved surface on the support, a plurality of bolts passing through the bucket structure into the opening or openings in the support, and means for :uljustably securing the bucketsupport to the casing.

6. In an elastic-fluid turbine, the combination of a casing having an opening formed therein, a support projecting through said opening and provided with a flange that engages the casing, buckets that are detachably secured to the support, lugs attached to the casing and the flange, and adjusting means carried by the lugs.

In witness whereof vl have hereunto set my hand this 28th day of April, 1903.

OSCAR JUNGGh-EN.

\Vitnesses:

ALEX. F. I\'IAOI)ONAI'.I), HELEN Onronn. 

